Remove people from group

[ChurchCRMBugReport]

While viewing a group of people, I was trying to remove them from a group. So I selected a few people, hit remove from group at the bottom. I get this error:
Error making API Call to: /api/groups/15/removeperson/101

Error text: parsererror SyntaxError: JSON Parse error: Unexpected EOF

So something is wrong there. I think it removed 1 of the 4 people selected.

Collected Value Title	Data
Page Name	/GroupView.php
Screen Size	1080x1920
Window Size	900x1546
Page Size	2248x1546
Platform Information	Linux ecbiz240.inmotionhosting.com 3.10.0-962.3.2.lve1.5.26.4.el7.x86_64 #1 SMP Wed Sep 11 10:29:54 EDT 2019 x86_64
PHP Version	7.1.30
SQL Version	5.5.5-10.2.25-MariaDB-log
ChurchCRM Version	3.5.5
Reporting Browser	Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Safari/605.1.15
Prerequisite Status	All Prerequisites met
Integrity check status	{"status":"success"}

[srice777]

I continued working with this, and it seems once I dropped below a certain number, there error went away. I don't know what the magic number is. It seems that you get in over 200 people... and it causes database slowdowns, and errors. This is similar to the cart issue. Somehow the data is not handled well when working with a larger group of people. Once I dropped below 200, the error didn't show up at all.

[DawoudIO]

not an issue with 5.x